LM567.pdf

May 1999

LM567/LM567C

Tone Decoder

General Description

The LM567 and LM567C are general purpose tone decoders

designed to provide a saturated transistor switch to ground

when an input signal is present within the passband. The cir-

cuit consists of an I and Q detector driven by a voltage con-

trolled oscillator which determines the center frequency of

the decoder. External components are used to indepen-

dently set center frequency, bandwidth and output delay.

n High rejection of out of band signals and noise

n Immunity to false signals

n Highly stable center frequency

n Center frequency adjustable from 0.01 Hz to 500 kHz

Applications

n Touch tone decoding

n Precision oscillator

n Frequency monitoring and control

n Wide band FSK demodulation

n Ultrasonic controls

n Carrier current remote controls

n Communications paging decoders

Features

n 20 to 1 frequency range with an external resistor

n Logic compatible output with 100 mA current sinking

capability

n Bandwidth adjustable from 0 to 14%

Connection Diagrams

Metal Can Package

Dual-In-Line and Small Outline Packages

DS006975-1

Top View

Order Number LM567H or LM567CH

See NS Package Number H08C

DS006975-2

Top View

Order Number LM567CM

See NS Package Number M08A

Order Number LM567CN

See NS Package Number N08E

DS006975

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Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Supply Voltage Pin

Operating Temperature Range

LM567H

−55˚C to +125˚C

LM567CH, LM567CM, LM567CN

0˚C to +70˚C

Soldering Information

Dual-In-Line Package

Soldering (10 sec.)

260˚C

Power Dissipation (Note 2)

1100 mW

Small Outline Package

Vapor Phase (60 sec.) 215˚C

Infrared (15 sec.) 220˚C

See AN-450 “Surface Mounting Methods and Their Effect

on Product Reliability” for other methods of soldering

surface mount devices.

V 8

15V

V 3

−10V

V 3

V 4 + 0.5V

Storage Temperature Range

−65˚C to +150˚C

Electrical Characteristics

AC Test Circuit, T A = 25˚C, V +

= 5V

LM567

LM567C/LM567CM

Parameters

Conditions

Units

Min

Typ

Max Min

Typ

Max

Power Supply Voltage Range

4.75

5.0

9.0 4.75

5.0

9.0

Power Supply Current Quiescent

R L = 20k

Power Supply Current Activated

R L = 20k

Input Resistance

k W

Smallest Detectable Input Voltage

I L = 100 mA, f i =f o

mVrms

Largest No Output Input Voltage

I C = 100 mA, f i =f o

mVrms

Largest Simultaneous Outband Signal to

Inband Signal Ratio

Minimum Input Signal to Wideband Noise

Ratio

B n = 140 kHz

−6

Largest Detection Bandwidth

% of f o

Largest Detection Bandwidth Skew

% of f o

Largest Detection Bandwidth Variation

with Temperature

± 0.1

%/˚C

Largest Detection Bandwidth Variation

with Supply Voltage

4.75–6.75V

± 1

± 2

± 1

± 5

Highest Center Frequency

100

500

100

500

kHz

Center Frequency Stability (4.75–5.75V)

0 < T A < 70

−55 < T A < +125

35 ± 60

35 ±

140

35 ± 60

35 ±

140

ppm/˚C

Center Frequency Shift with Supply

Voltage

4.75V–6.75V

4.75V–9V

0.5

1.0

2.0

0.4

2.0

%/V

% /V

Fastest ON-OFF Cycling Rate

f o /20

Output Leakage Current

V 8 = 15V

0.01

µA

Output Saturation Voltage

e i = 25 mV, I 8 =30mA

e i = 25 mV, I 8 = 100 mA

0.2

0.6

0.4

1.0

0.2

0.6

0.4

1.0

Output Fall Time 30 30 ns

Output Rise Time 150 150 ns

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is func-

tional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guar-

antee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit is

given, however, the typical value is a good indication of device performance.

Note 2: The maximum junction temperature of the LM567 and LM567C is 150˚C. For operating at elevated temperatures, devices in the TO-5 package must be de-

rated based on a thermal resistance of 150˚C/W, junction to ambient or 45˚C/W, junction to case. For the DIP the device must be derated based on a thermal resis-

tance of 110˚C/W, junction to ambient. For the Small Outline package, the device must be derated based on a thermal resistance of 160˚C/W, junction to ambient.

Note 3: Refer to RETS567X drawing for specifications of military LM567H version.

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